CloudWatch Events (EventBridge) in AWS - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is AWS CloudWatch Events (EventBridge)?

AWS CloudWatch Events, now called EventBridge, is a service that helps you respond to changes in your AWS resources or applications by routing events to targets like Lambda functions or SNS topics automatically.

beginner

How does EventBridge differ from traditional polling methods?

EventBridge uses event-driven architecture, meaning it reacts instantly to events without needing to constantly check (poll) for changes, saving resources and improving responsiveness.

intermediate

What are the main components of an EventBridge rule?

An EventBridge rule has two main parts: the event pattern (which decides which events to catch) and the target (where the event is sent, like a Lambda function or an SQS queue).

intermediate

Can EventBridge receive events from SaaS applications?

Yes, EventBridge can receive events from supported SaaS applications, allowing you to integrate external services easily into your AWS event-driven workflows.

intermediate

What is the benefit of using EventBridge over CloudWatch Events?

EventBridge is the evolution of CloudWatch Events with more features like custom event buses, SaaS integration, and better event filtering, making it more flexible for complex event-driven architectures.

What does an EventBridge rule primarily consist of?

A IAM role and policy

B Lambda function and S3 bucket

C Event pattern and target

D EC2 instance and security group

An EventBridge rule consists of an event pattern to match events and a target to send matched events to.

Which AWS service can be a target for EventBridge events?

A CloudFront distribution

B Lambda function

C Route 53 hosted zone

D EC2 instance directly

Lambda functions are common targets for EventBridge events to process or react to events.

EventBridge can receive events from which of the following external sources?

A Supported SaaS applications

B On-premises servers without integration

C Only AWS internal services

D Local desktop applications

EventBridge supports receiving events from certain SaaS applications integrated with AWS.

What is a key advantage of EventBridge over polling for changes?

A It reacts instantly to events without constant checking

B It requires manual refresh to detect changes

C It uses more compute resources

D It only works with EC2 instances

EventBridge uses event-driven architecture to react instantly, avoiding resource-heavy polling.

Which of the following is NOT a valid EventBridge target?

A SNS topic

B Lambda function

C Step Functions state machine

D S3 bucket directly

EventBridge cannot send events directly to an S3 bucket; it sends to compute or messaging services.

Explain how EventBridge helps automate responses to AWS resource changes.

Think about how events trigger actions without manual checks.

Describe the difference between CloudWatch Events and EventBridge.

Focus on new features and flexibility.